buoyancy refence density

February 9, 2006, 11:20

Hi, i have an analisys in steady state, interaction between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F.

The question is: I did an analisys with a bouyancy reference density of 1.1 kg/m^3 and other with a bouyancy reference density of 1.2 kg/m^3. The boundary conditions are the same in both cases, Why did I find a big difference in the results?

February 28, 2006, 14:05

I did an analisys in steady state, interface between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F in the analysis.

If the analisys has a bouyancy reference density of 1.05 kg/m^3 and other analysis has a bouyancy reference density of 1.1 kg/m^3. The boundary conditions are the same in both cases, Why did I find a huge difference in the results?

--------------------------------------------------------------------------------

February 28, 2006, 14:08

February 28, 2006, 14:10

I did an analisys in steady state, interface between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F in the analysis.

If the analisys has a bouyancy reference density of 1.05 kg/m^3 and other analysis has a bouyancy reference density of 1.1 kg/m^3. The boundary conditions are the same in both cases, Why did I find a huge difference in the results?

February 9, 2006, 11:20	buoyancy refence density	#1
Luis Angel Guest Posts: n/a	Hi, i have an analisys in steady state, interaction between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F. The question is: I did an analisys with a bouyancy reference density of 1.1 kg/m^3 and other with a bouyancy reference density of 1.2 kg/m^3. The boundary conditions are the same in both cases, Why did I find a big difference in the results?

February 28, 2006, 14:05	Re: buoyancy refence density	#2
Luis Angel Guest Posts: n/a	I did an analisys in steady state, interface between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F in the analysis. If the analisys has a bouyancy reference density of 1.05 kg/m^3 and other analysis has a bouyancy reference density of 1.1 kg/m^3. The boundary conditions are the same in both cases, Why did I find a huge difference in the results? --------------------------------------------------------------------------------

February 28, 2006, 14:08	Re: buoyancy refence density NM	#3
Luis Angel Guest Posts: n/a

February 28, 2006, 14:10	Re: buoyancy refence density	#4
Luis Angel Guest Posts: n/a	I did an analisys in steady state, interface between steel and air (Air Gas Ideal), a temperature range of 77 F to 770 F in the analysis. If the analisys has a bouyancy reference density of 1.05 kg/m^3 and other analysis has a bouyancy reference density of 1.1 kg/m^3. The boundary conditions are the same in both cases, Why did I find a huge difference in the results?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Buoyancy reference density	Luis	CFX	5	October 19, 2007 09:37
REAL GAS UDF	brian	FLUENT	6	September 11, 2006 08:23
operating density in buoyancy driven flow	Marie-Anne	Main CFD Forum	2	March 24, 2006 09:52
CFX buoyancy ref density	Luis Angel	Main CFD Forum	0	February 28, 2006 14:06
Warning 097-	AB	Siemens	6	November 15, 2004 04:41